The Cliff Swallow, although not a federally listed or state listed species in Massachusetts, is informally watch listed in Massachusetts. The Cliff Swallow colony at Graves Farm has been monitored annually since 1991. There is also a good representation of the breeding species of the region and a high density of territories that appear to have been stable over time. The maximum number of Cliff Swallows was 63 pairs in 1993. Bobolinks nest in the fields.

Graves Farm Wildlife Sanctuary has been designated by the National Audubon Society as an Important Bird Area.

For over 125 years, Graves Farm Wildlife Sanctuary was managed as a dairy farm. The now-protected wildlife sanctuary is complete with mixed forest, dramatic geologic features, pristine cold-water streams, and serene pastoral landscapes.

Explore 1.5 miles of trails at Graves Farm Wildlife Sanctuary. Blue trail markers lead away from the parking area, yellow trail markers lead back to the parking area.

Nonnie Day Brook Loop
An easy 15-20 minute walk leads you through a stand of mature white pines and hemlock. Look for the impressive white pine at the sharp bend in the trail, search for woodland birds, or simply enjoy the sounds of the rushing brook.

Graves Brothers Loop Trail
Cross Nonnie Day Brook to access this trail. After passing through a hemlock and white pine forest the trail gradually ascends into a mixed hardwood forest. Signs of moose, bear, and bobcat have been found in the surrounding woodland. Walking this trail adds 20-30 minutes to your visit.